A quantifier repeats an atom a certain number of times. The quantifier is placed after the atom it applies to.

The Uint32Array typed array represents an array of 32-bit unsigned integers in the platform byte order. If control over byte order is needed, use DataView instead. The contents are initialized to 0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).

The Promise object represents the eventual completion (or failure) of an asynchronous operation and its resulting value.

The bbox attribute defines the maximal bounding box of a font.

A word boundary assertion checks if the current position in the string is a word boundary. A word boundary is where the next character is a word character and the previous character is not a word character, or vice versa.

The JavaScript exception "BigInt division by zero" occurs when a BigInt is divided by 0n.

The <rect> element is a basic SVG shape that draws rectangles, defined by their position, width, and height. The rectangles may have their corners rounded.

The destructuring assignment syntax is a JavaScript expression that makes it possible to unpack values from arrays, or properties from objects, into distinct variables.

The alignment-baseline attribute specifies how an object is aligned with respect to its parent. This property specifies which baseline of this element is to be aligned with the corresponding baseline of the parent. For example, this allows alphabetic baselines in Roman text to stay aligned across font size changes. It defaults to the baseline with the same name as the computed value of the alignment-baseline property.

A WeakRef object lets you hold a weak reference to another object, without preventing that object from getting garbage-collected.